package com.lzx.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lzx.reggie.common.R;
import com.lzx.reggie.entity.Employee;
import com.lzx.reggie.service.EmployeeService;
import lombok.RequiredArgsConstructor;
import lombok.extern.java.Log;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
@RequiredArgsConstructor //推荐注入的方法
public class EmployeeController {

    //    @Autowired
    /*spring不推荐使用这种方法，推荐使用构造函数去注入；如果说使用构造函数太长了，就使用lombok中的
     * @RequiredArgsConstructor(@AllArgsConstructor全部都生成构造函数)生成构造函数，并在要生成构造函数的变量上添加final关键字*/
    private final EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1.将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没有查到返回登录失败的结果
        if (emp == null) {
            return R.error("登录失败，用户不存在");
        }

        //4.密码比对
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败，密码错误");
        }

        //5.查看员工的状态是否可用
        if (emp.getStatus() == 0) {
            return R.error("登录失败，账号已禁用");
        }

        //6.登录成功，将员工id存入Session并返回成功 结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清除Session中保存的当前员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     *
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息为：{}", employee);

        //设置初始密码123456，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        /*//设置创建和更新时间的初始值
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //获得当前登录用户的id
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page={},pageSize={},name={}", page, pageSize, name);

        //1.构建分页构造器
        Page pageInfo = new Page(page, pageSize);

        //2.构建条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加过滤条件
        queryWrapper.like(name != null, Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //3.执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工
     *
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        //设置更新时间和更新人
        employee.setUpdateTime(LocalDateTime.now());
        Long empId =(Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);

        employeeService.updateById(employee);

        return R.success("员工信息修改成功...");
    }

    /**
     *根据id查询员工
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id：{}查询员工信息",id);

        Employee employee = employeeService.getById(id);
        if (employee!=null){
            return R.success(employee);
        }

        return R.error("没有查询到此员工信息");
    }


}
